The only true wisdom is in knowing you know nothing.

There is only one good, knowledge, and one evil, ignorance.

One can have no smaller or greater mastery than mastery of oneself.

Wisdom is the daughter of experience.

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

Art is never finished, only abandoned.

My brain is only a receiver, in the Universe there is a core from which we obtain knowledge, strength and inspiration. I have not penetrated into the secrets of this core, but I know that it exists.

I have been impressed with the urgency of doing. Knowing is not enough, we must apply. Being willing is not enough, we must do.

If you can't explain it to a six year old, you don't understand it yourself.